<template>
  <div class="shopCar">
    <div class="goodsList">
      <div class="mui-card" v-for="(item,i) in goodsList" :key="item.id">
        <div class="mui-card-content">
          <div class="mui-card-content-inner">
          <mt-switch v-model="$store.getters.getGoodsSelected[item.id]"
          @change="selectedChange(item.id,$store.getters.getGoodsSelected[item.id])"
          ></mt-switch>
          <img :src="item.thumb_path" >
          <div class="info">
            <h3>{{item.title}}</h3>
          <p>
            <span class="price">${{item.sell_price}}</span>
            <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsId="item.id"></numbox>
<!-- 问题:如何从购物车中获取商品的数量
1.我们可以先创建一个空对象,然后循环购物车中的所有商品,
把当前循环这个条商品的Id,作为一个对象的属性名 count值作为对象的属性值,这样当把所有的商品循环一遍,
就会得到一个对象:{88:2,891,90:4} -->

            <!-- 这里的item.id是删除state中的数据,i是删除goodsList中的数据 -->
            <a href="#" @click.prevent="remove(item.id,i)">删除</a>
          </p>
          </div>
          </div>
        </div>
      </div>
    </div>
    <!-- 结算区域 -->
    <div class="mui-card">
      <div class="mui-card-content">
        <div class="mui-card-content-inner jiesuan">
          <div class="left">
            <p>总计(不含运费)</p>
            <p>已选商品<span>{{$store.getters.getGoodsCountAndAmount.count}}</span>件 
            总价<span>${{$store.getters.getGoodsCountAndAmount.amount}}</span></p>
          </div>
          <mt-button type="danger">去结算</mt-button>
        </div>
      </div>
    </div>
  </div>
</template>
 
<script>
import numbox from "../subcomponents/shopCar_numbox"
export default {
  name: "",
  data() {
    return {
      goodsList:[]
    };
  },
  mounted(){
    this.getGoodsList();
  },
  methods:{
    getGoodsList(){
      //1.获取到store中所有的商品的Id,然后拼接出一个 用逗号分隔的字符串
      let idArr=[];
      this.$store.state.car.forEach(e=>idArr.push(e.id));
      //如果购物车中没有商品,则直接返回
      if(idArr.length===0){
        return
      }
      //获取购物车商品列表
      this.$http.get("api/goods/getshopcarlist/"+idArr.join(","))
      .then(res=>{
        if(res.body.status==0){
          this.goodsList=res.body.message;
        }
      })
    },
    remove(id,index){
      //点击删除,把商品从store中根据id删除,同时,把当前组件中goodsList,对应要删除的那个商品,使用index来删除
        this.goodsList.splice(index,1);
        this.$store.commit("removeFromCar",id);
    },
    selectedChange(id,val){
//每当点击开关,把最新的开关状态同步到store中
   console.log(id+'---'+val);
   this.$store.commit('updateGoodsSelected',{id,selected:val})
    }
  },
  components:{
    numbox
  }
};
</script>
 
<style scoped lang = "scss">
.shopCar {
  background-color: #eee;
  overflow: hidden;
  .goodsList{
    .mui-card-content-inner{
      display:flex;
      align-items: center;
    }
    img{
      width: 60px;
      height: 60px;
    }
    h3{
      font-size: 16px;
    }
    .info{
      .price{color: red;font-weight: bold;}
    }
    
  }
.jiesuan{
      display: flex;
      justify-content: space-between;
      align-items: center;
      .left{
        span{
          color: red;
          font-weight: bold;
          font-size: 16px;
        }
      }
    }
}
</style>